JPH05332806A - Liquid amount measuring device - Google Patents
Liquid amount measuring deviceInfo
- Publication number
- JPH05332806A JPH05332806A JP13872792A JP13872792A JPH05332806A JP H05332806 A JPH05332806 A JP H05332806A JP 13872792 A JP13872792 A JP 13872792A JP 13872792 A JP13872792 A JP 13872792A JP H05332806 A JPH05332806 A JP H05332806A
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- tank
- liquid
- pressure tank
- amount
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Measuring Fluid Pressure (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は宇宙ステーション，一般
宇宙機，等の液体タンクの液量計測装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid amount measuring device for a liquid tank of a space station, a general spacecraft, or the like.
【０００２】[0002]
【従来の技術】従来，宇宙機器および地上輸送機等の液
体タンクにおいては液面が不安定のため，通常の液面計
では測定精度が不良である。したがって従来は図２に示
す方法で計測されている。2. Description of the Related Art Conventionally, a liquid level is unstable in a space tank and a liquid tank of a ground transportation machine, so that an ordinary level gauge has a poor measurement accuracy. Therefore, conventionally, the measurement is performed by the method shown in FIG.
【０００３】液体を貯蔵するタンク１１は，初めに液ａ
と共に高圧ガスｂを封入しておく。液ａは吐出弁３を開
くことにより，吐出管２より流出させて使う。このため
タンク内の圧力は順次下降していく。これを圧力計１０
にて検出，また温度も温度計１２にて検出する。これら
の値を用いて，次の式（１）の理想気体の状態式にて
Ｍ，Ｐ，Ｒ，Ｔ既知として，体積Ｖを求める。そしてこ
の（気体）体積をタンク全容積から差引いて液量を求め
る。The tank 11 for storing the liquid is initially filled with the liquid a.
At the same time, the high pressure gas b is enclosed. The liquid a is used by flowing out from the discharge pipe 2 by opening the discharge valve 3. Therefore, the pressure in the tank gradually decreases. This is a pressure gauge 10
The temperature is also detected by the thermometer 12. Using these values, the volume V is obtained with M, P, R, and T known in the ideal gas state equation of the following equation (1). Then, the liquid volume is obtained by subtracting this (gas) volume from the total volume of the tank.
【０００４】 ＰＶ＝ＭＲＴ ………………（１） ただし，Ｐ：圧力，Ｔ：温度，Ｒ：ガス常数，Ｖ：体
積，Ｍ：質量 実用上は，計測の都度上記計算を行うのは煩雑であるか
ら，予め計算にて圧力Ｐと残り液量との関係を図３に示
すように求めておく。そして圧力から液の残量を求め
る。PV = MRT (1) However, P: Pressure, T: Temperature, R: Gas constant, V: Volume, M: Mass In practice, the above calculation is performed each time measurement is performed. Since it is complicated, the relationship between the pressure P and the remaining liquid amount is calculated in advance as shown in FIG. Then, the remaining amount of liquid is obtained from the pressure.
【０００５】[0005]
【発明が解決しようとする課題】上記従来の装置には次
のような問題点があった。 （１） 液体と気体が混在したタンクの中では，圧力計
の受圧面に液体が不規則的に付着したり離脱したりする
ため，この影響により圧力計測値に信頼性がない。 （２） 初期に，タンク内に高圧の液と気体を封入する
が，各封入量を精度よく調節することが難しいため，初
期誤差を生じ，これがその後の計測精度を劣化させる。 （３） 液体タンク全体を高圧とする必要があるため，
タンクの肉厚増となり重量，製造および輸送コストの増
加となり経済性がない。The above-mentioned conventional device has the following problems. (1) In a tank in which liquid and gas are mixed, the liquid adheres to and detaches from the pressure receiving surface of the pressure gauge irregularly, and this influences the reliability of the pressure measurement value. (2) Initially, high-pressure liquid and gas are filled in the tank, but since it is difficult to adjust the amount of each filling accurately, an initial error occurs, which deteriorates the subsequent measurement accuracy. (3) Since it is necessary to raise the pressure of the entire liquid tank,
It is not economical because the thickness of the tank increases and the weight, manufacturing and transportation costs increase.
【０００６】[0006]
【課題を解決するための手段】本発明は上記課題を解決
するため次の手段を講ずる。The present invention takes the following means in order to solve the above problems.
【０００７】すなわち，液量計測装置として，高圧タン
クと，同高圧タンクに設けられる温度計および圧力計
と，計測対象の低圧タンクと，上記高圧タンクおよび低
圧タンク間を圧力調節弁を介して接続する加圧管と，上
記低圧タンクの出口に吐出弁を介して接続される吐出管
とを設ける。That is, as a liquid amount measuring device, a high-pressure tank, a thermometer and a pressure gauge provided in the high-pressure tank, a low-pressure tank to be measured, and the high-pressure tank and the low-pressure tank are connected via a pressure control valve. And a discharge pipe connected to the outlet of the low-pressure tank via a discharge valve.
【０００８】[0008]
【作用】上記手段において，初期設定時は，低圧タンク
内は液のみを充填，高圧タンク内は気体のみを封入す
る。In the above means, at the time of initial setting, only the liquid is filled in the low pressure tank and only the gas is filled in the high pressure tank.
【０００９】液の使用時は，吐出弁と圧力調節弁が開か
れると，高圧タンクから気体が低圧タンクに送入され，
液が吐出弁を経て排出される。When the liquid is used, when the discharge valve and the pressure control valve are opened, gas is sent from the high pressure tank to the low pressure tank,
The liquid is discharged through the discharge valve.
【００１０】このとき高圧タンクの圧力および温度と低
圧タンクの残り液量の関係を予め計算ないし予備較正に
より求めておくと，この圧力値を圧力計で計れば，低圧
タンク内の残り液量が求められる。At this time, if the relationship between the pressure and temperature of the high-pressure tank and the remaining liquid amount in the low-pressure tank is calculated in advance or obtained by preliminary calibration, if this pressure value is measured with a pressure gauge, the remaining liquid amount in the low-pressure tank will be calculated. Desired.
【００１１】このようにして，低圧タンクから離れた位
置にある気体のみの封入された高圧タンク部で圧力が計
測される。したがって受圧面に液体が付着する等の問題
がなく測定精度が向上する。In this way, the pressure is measured in the high pressure tank portion, which is located away from the low pressure tank and is filled with only the gas. Therefore, there is no problem that liquid adheres to the pressure receiving surface and the measurement accuracy is improved.
【００１２】また低圧タンクには液のみを，高圧タンク
には気体のみを充填するので，その封入量が精度よく決
まる。したがって，その後の残り液量が精度よく計測さ
れる。Further, since the low-pressure tank is filled with only the liquid and the high-pressure tank is filled with only the gas, the sealed amount is accurately determined. Therefore, the remaining liquid amount after that can be accurately measured.
【００１３】[0013]
【実施例】本発明の一実施例を図１，図３により説明す
る。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS.
【００１４】図１にて，圧力計７と温度計８を持つ高圧
タンク４が設けられる。また計測対象の低圧タンク１が
設けられ，その出口には吐出弁３を介して吐出管３が接
続される。さらに，高圧タンク４と低圧タンク１間に
は，圧力調節弁６を介して加圧管５が接続される。圧力
調節弁６の吐出側と圧力調節弁６間には圧力計／調節器
１０を介して計装配管９が接続される。In FIG. 1, a high pressure tank 4 having a pressure gauge 7 and a thermometer 8 is provided. A low-pressure tank 1 to be measured is provided, and a discharge pipe 3 is connected to the outlet of the low-pressure tank 1 via a discharge valve 3. Further, a pressurizing pipe 5 is connected between the high pressure tank 4 and the low pressure tank 1 via a pressure control valve 6. An instrumentation pipe 9 is connected between the discharge side of the pressure control valve 6 and the pressure control valve 6 via a pressure gauge / regulator 10.
【００１５】以上の構成において，以下作用効果の説明
を初期設定，液の使用，液量計測に分けて順次説明す
る。 （１）初期設定 吐出弁３および圧力調節弁６は閉とし，低圧タンク１に
は別途の（図示しない）充填配管から液を充填し，図示
しないガス抜き弁などを使って最終的にタンク内が液の
みとなるようにする。In the above structure, the description of the function and effect will be sequentially divided into the initial setting, the use of the liquid, and the measurement of the liquid amount. (1) Initial setting The discharge valve 3 and the pressure control valve 6 are closed, the low-pressure tank 1 is filled with liquid from a separate (not shown) filling pipe, and the inside of the tank is finally filled by using a gas vent valve (not shown). So that there is only liquid.
【００１６】一方高圧タンク４には図示しない充填配管
から高圧気体を充填していって，最終的に所要の圧力Ｐ
O となるようにする。 （２）液の使用 液の使用時は吐出弁３および圧力調節弁６を開として，
高圧タンク４内の気体を低圧タンク１に流入させる。す
ると低圧タンク１内の液が押し出されて吐出管２より流
出していく。この際，調節弁６の下流に設けた計装配管
９および圧力計／調節器１０により，調節弁６の開度が
調節され，下流圧力が一定値となるように制御される。On the other hand, the high pressure tank 4 is filled with high pressure gas from a filling pipe (not shown), and finally the required pressure P is reached.
Make it O. (2) Use of liquid When using the liquid, open the discharge valve 3 and the pressure control valve 6,
The gas in the high pressure tank 4 is caused to flow into the low pressure tank 1. Then, the liquid in the low-pressure tank 1 is pushed out and flows out from the discharge pipe 2. At this time, the opening of the control valve 6 is adjusted by the instrumentation pipe 9 and the pressure gauge / regulator 10 provided downstream of the control valve 6, and the downstream pressure is controlled to be a constant value.
【００１７】高圧タンク４の圧力は序々に降下する。こ
れは圧力計７で計測される。また高圧タンク４内の代表
温度も温度計８で計測される。 （３）液量計測 高圧タンク４内の温度が殆んど変らない場合，かつ低圧
タンク１内から液のみが吐出管２より流出する場合に
は，液の積算吐出量（あるいは液のタンク内残量）と高
圧タンク４内の圧力計測値とは精度よく対応する。した
がって，この関係を，図３に示すように，予め較正試験
を行なって求めておくことによって，圧力計７の読みか
ら液の残量が求められる。The pressure in the high-pressure tank 4 gradually drops. This is measured by the pressure gauge 7. The representative temperature inside the high-pressure tank 4 is also measured by the thermometer 8. (3) Liquid amount measurement When the temperature in the high-pressure tank 4 hardly changes and only the liquid flows out of the low-pressure tank 1 through the discharge pipe 2, the accumulated discharge amount of the liquid (or the inside of the liquid tank) The remaining amount) and the pressure measurement value in the high-pressure tank 4 correspond accurately. Therefore, as shown in FIG. 3, this relationship is obtained by performing a calibration test in advance, so that the remaining amount of the liquid can be obtained from the reading of the pressure gauge 7.
【００１８】上記実施例によれば，従来例に比し，次の
ような利点がある。 初期の液体および気体充填が低圧タンクおよび高圧
タンクに夫々充満されるので充填量が正確であり，初期
誤差が生じない。 圧力計の受圧面は，常に気体のみに触れているため
正常な作動を維持できる。このため，圧力計測値の精度
が保たれる。 従来例に比較して，高圧タンク等が増すことにはな
るが，高圧タンクは小型のものですむため，装置全体か
らみて重量の大増加とはならない。一方，低圧タンクは
肉厚の薄いもので良いから重量が少なくでき，製造コス
トおよび輸送コストが大幅に削減できる。The above embodiment has the following advantages over the prior art. Since the initial liquid and gas fillings are filled in the low-pressure tank and the high-pressure tank respectively, the filling amount is accurate and no initial error occurs. Since the pressure receiving surface of the pressure gauge is always in contact with only gas, normal operation can be maintained. Therefore, the accuracy of the pressure measurement value is maintained. Compared with the conventional example, the number of high-pressure tanks will increase, but since the high-pressure tank will be small, the weight of the entire device will not increase significantly. On the other hand, since the low-pressure tank can be thin, the weight can be reduced, and the manufacturing cost and transportation cost can be significantly reduced.
【００１９】なお，タンクが軽量できた分だけ液タンク
を大型化して，その分だけ液を多く搭載することができ
る。これは宇宙輸送機の場合には寿命を永くできるとい
う，大きな利点となる。It should be noted that the liquid tank can be upsized by the weight of the tank, and a large amount of liquid can be loaded accordingly. This is a great advantage that the life of a space transportation aircraft can be extended.
【００２０】[0020]
【発明の効果】以上に説明したように，本発明によれ
ば，高圧タンクに圧力計を設けたので，圧力計の受圧面
に液体が付着する等の問題がなく，測定精度が向上す
る。As described above, according to the present invention, since the high pressure tank is provided with the pressure gauge, there is no problem that liquid adheres to the pressure receiving surface of the pressure gauge and the measurement accuracy is improved.
【００２１】また液用の低圧タンク，気体用の高圧タン
クを設けたので，それぞれの封入量が精度よく決まる。
したがって，その後の残り液量が精度よく計測される。Further, since the low-pressure tank for liquid and the high-pressure tank for gas are provided, the enclosed amount of each is accurately determined.
Therefore, the remaining liquid amount after that can be accurately measured.
【００２２】さらに，液用のタンクを低圧にしたので，
重量軽減が計られる。したがって製造コストおよび輸送
コストが大幅に低下する。Further, since the liquid tank is set to a low pressure,
Weight reduction is measured. Therefore, manufacturing costs and transportation costs are significantly reduced.
【図１】図１は本発明の実施例に係る液量計測装置の図
である。FIG. 1 is a diagram of a liquid amount measuring device according to an embodiment of the present invention.
【図２】図２は従来例の液量計測装置の図である。FIG. 2 is a diagram of a conventional liquid amount measuring device.
【図３】図３は上記実施例および従来例の作用説明図で
ある。FIG. 3 is an operation explanatory view of the above-mentioned embodiment and the conventional example.
１ 低圧（液）タンク ２ 吐出管 ３ 吐出弁 ４ 高圧タンク ５ 加圧管（配管） ６ 圧力調節弁（弁） ７ 圧力計 ８ 温度計 1 Low pressure (liquid) tank 2 Discharge pipe 3 Discharge valve 4 High pressure tank 5 Pressurizing pipe (piping) 6 Pressure control valve (valve) 7 Pressure gauge 8 Thermometer
Claims (1)
る温度計および圧力計と，計測対象の低圧タンクと，上
記高圧タンクおよび低圧タンク間を圧力調節弁を介して
接続する加圧管と，上記低圧タンクの出口に吐出弁を介
して接続される吐出管とを備えてなることを特徴とする
液量計測装置。1. A high-pressure tank, a thermometer and a pressure gauge provided in the high-pressure tank, a low-pressure tank to be measured, a pressurizing pipe connecting the high-pressure tank and the low-pressure tank via a pressure control valve, and A liquid amount measuring device comprising a discharge pipe connected to an outlet of a low-pressure tank via a discharge valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13872792A JPH05332806A (en) | 1992-05-29 | 1992-05-29 | Liquid amount measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13872792A JPH05332806A (en) | 1992-05-29 | 1992-05-29 | Liquid amount measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05332806A true JPH05332806A (en) | 1993-12-17 |
Family
ID=15228748
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13872792A Pending JPH05332806A (en) | 1992-05-29 | 1992-05-29 | Liquid amount measuring device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05332806A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109748231A (en) * | 2019-02-28 | 2019-05-14 | 杨哲 | A kind of liquid feed device and method |
-
1992
- 1992-05-29 JP JP13872792A patent/JPH05332806A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109748231A (en) * | 2019-02-28 | 2019-05-14 | 杨哲 | A kind of liquid feed device and method |
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